This class is meant to be a suitable basis for most implementations
of a service that implements ServiceControlListener.
You will only have to implement the service()-method, which will be
invoked continuously in the service's main loop.
You may also implement the init()-method which will be invoked anytime
the service is started, and the destroy()-method which will be invoked
anytime the service is stopped.
This interface needs to be implemented in order to provide a special
type of socket (native pilot-link socket, Network HotSync socket,
pure Java serial socket).